Improperly applied mulch around the base of the tree, two years later. Tree showing stress. Photo credit: N. Gregory

Eastern tent caterpillar. Photo credit: Lacy L. Hyche, Auburn University, bugwood-org

Impatiens cultivar ‘Imara XDR Orange’. Photo
credit: Syngenta Seed

Eastern tent caterpillar tent. Photo credit: Robert L. Anderson, USDA Forest Service, bugwood-org

Spotted lanternfly adults and egg masses. Photo credit: B. Kunkel

Snapdragon with root rot on the left and healthy roots on the right. Photo credit: N. Gregory

Hairy bittercress in the landscape. Photo credit: N. Gregory

Flats of pansies with irregular growth.
Photo credit: N. Gregory

Wilted poinsettia with Pythium root rot. Photo
credit: N. Gregory

European hornets. Photo credit: N. Gregory

Greenhouse whitefly adult. Photo credit: D. Cappaert, bugwood

Silverleaf whitefly nymph. Photo credit: FL Division of Plant Industry, bugwood

Silverleaf whitefly adult. Photo credit: S. Bauer, USDA ARS, bugwood

Rhizomorphs of Armillaria. Photo
credit: N. Gregory

Anthracnose leaf spot on silver maple. Photo credit: N. Gregory

Dodder on anemone. Photo credit: N. Gregory

Inonotus bracket fungus from oak. Photo credit: N. Gregory

Spruce spider mites. Photo credit: T. Wootten

Flooded mower tracks, UD Botanic Gardens.
Photo credit: N. Gregory

Standing water, Newark Farm in June. Photo
credit: N. Gregory